RE:Quiz ; find the errorThere is no error. Breizh1. They are not referring to Quartz as the internally sourced material. They are referring to "internally sourced feedstock material produced by its proprietary PUREVAP TM QRR process". The pilot plant is an assembly line. Quartz is a raw material that goes in at the begiining. The feedstock material reffered to in the release is a product produced by the PUREVAP TM QRR process not what they source from a mine.